As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING UNRELATED MAINTENANCE, FOUND SEALING LIP THAT HELPS SEAL THE TURBINE HOUSING TO THE TURBOCHARGER CENTER SECTION ERODED AWAY AND THE GASKET PARTIALY BLOWN OUT. INSPECTION OF THE NUMBER ONE ENGINE TURBO WITH LIKE HOURS REVEALED A SIMILAR CONDITION. SUBMITTER STATES A 500 HOUR INSPECTION SHOULD BE IMPLEMENTED TO PREVENT THIS POTENTIALLY HAZARDOUS CONDITION.